<template>
  <div style="width: 500px">
    <el-input
        placeholder="请输入部门名称进行搜索..."
        prefix-icon="el-icon-search"
        v-model="filterText">
    </el-input>

    <el-tree
        :data="deps"
        :props="defaultProps"
        :filter-node-method="filterNode"
        :expand-on-click-node="false"
        ref="tree">
      <span
          class="custom-tree-node"
          slot-scope="{ node , data }"
          style="display: flex; justify-content: space-between; width: 100%">
        <span>{{ data.name }}</span>
        <span>
          <el-button
              class="depBtn"
              type="success"
              size="mini"
              @click="() => showAddDep(data)">
            添加部门
          </el-button>
          <el-button
              class="depBtn"
              type="danger"
              size="mini"
              @click="() => deleteDep(data)">
            删除部门
          </el-button>
        </span>
      </span>
    </el-tree>
    <el-dialog title="添加部门" :visible.sync="dialogVisible" width="30%">
      <div>
        <table>
          <tr>
            <td><el-tag>上级部门</el-tag></td>
            <td>{{ pname }}</td>
          </tr>
          <tr>
            <td><el-tag>部门名称</el-tag></td>
            <td>
              <el-input
                  v-model="dep.name"
                  placeholder="请输入部门名称..."
              ></el-input>
            </td>
          </tr>
        </table>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false" type="xxx">取 消</el-button>
        <el-button type="success" @click="doAddDep">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'DepMana',
  data() {
    return {
      filterText: '',
      deps: [],
      defaultProps: {
        children: 'children',
        label: 'name',
      },
      dialogVisible: false,
      dep: {
        name: '',
        parentId: -1,
      },
      pname: '',
    }
  },
  methods: {
    filterNode(value, data) {
      if (!value) return true;
      return data.name.indexOf(value) !== -1;
    },
    initDeps() {
      this.getRequest('/system/basic/department/').then((resp) => {
        if (resp) {
          this.deps = resp;
        }
      })
    },
    showAddDep(data) {
      this.dep.parentId = data.id;
      this.pname = data.name;
      this.dialogVisible = true;
    },
    deleteDep(data) {
      if (data.isParent) {
        this.$message.error('父部门删除失败')
      } else {
        this.$confirm(
            '此操作将永久删除[' + data.name + ']部门, 是否继续?',
            '提示',
            {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning',
            }).then(() => {
              this.deleteRequest('/system/basic/department/' + data.id).then((resp) => {
                    if (resp) {
                      this.removeDepFromDeps(null, this.deps, data.id)
                    }
                  })
            }).catch(() => {
              this.$message({
                type: 'info',
                message: '已取消删除',
              })
            })
      }
    },
    doAddDep() {
      this.postRequest('/system/basic/department/', this.dep).then((resp) => {
        if (resp) {
          this.addDepToDeps(this.deps, resp.obj);
          this.dialogVisible = false;
          this.initDep();
        }
      })
    },
    initDep() {
      this.dep = {
        name: '',
        parentId: -1,
      }
      this.pname = '';
    },
    addDepToDeps(deps, dep) {
      for (let i = 0; i < deps.length; i++) {
        let d = deps[i]
        if (d.id == dep.parentId) {
          if (d.children == null) {
            d.children = []
          } //因为会报错是null
          d.children = d.children.concat(dep)
          if (d.children.length > 0) {
            d.isParent = true
          }
          return
        } else {
          this.addDepToDeps(d.children, dep)
        }
      }
    },
    removeDepFromDeps(p, deps, id) {
      for (let i = 0; i < deps.length; i++) {
        let d = deps[i]
        if (d.id == id) {
          deps.splice(i, 1)
          if (deps.length == 0) {
            p.isParent = false
          }
          return
        } else {
          this.removeDepFromDeps(d, d.children, id)
        }
      }
    },
  },
  mounted() {
    this.initDeps();
  },
  watch: {
    filterText(val) {
      this.$refs.tree.filter(val)
    },
  },
}
</script>

<style>
  .depBtn {
    padding: 4px;
  }
  .el-button--xxx:hover{
    background: #F0F9EB;
    color: #67C23A;
  }
</style>